Bolt



Dec. Mi, i924.

A. W. HOOD BOLT Filed Feb. 23, 1924 Rigi E;

Patented Dec. i6, i924.

srrss NDREW W. HOOD, 0F PHILADELPHIA, PENNSYLVANIA.

BOLT.

Application filed February 28, 1924. Serial. No. 694,757.

.To all whom t may concern:

Be it known that l, ANDREW W. Hoon, a citizen of the United States, andresident of Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful improvements inBolts, of which the following is a specification.

This invention relates to bolts and particularly to bolts such as areused for drawing and temporarily holding a plurality ot steel platestogether before the latter are riveted, suoli bolts being known in theart as fitting-up bolts.

An object of the invention is to provide a bolt of this class havingeither an integral or xed head or adjustable head and provided with awedge-like locking member adapted to engage the bolt shank instead of anut to draw and hold the plates or other work pieces together.

Another object is to provide a bolt oit this class with a series ofdepressions along both sides of its shank for the reception of thelocking member, so as to allow the locking member to engage and lockplates of varyvn ing thicknesses.

A further object is to provide a ttingnp bolt having the novelarrangement, construction, design, and combination of parts hereinafterdescribed and illustrated in the accompanying drawings.

lin the drawings, Figure l is a side elevation of a bolt constructed inaccordance with my invention, showing it in position holding a pair ofplates together, the plates being shown in dotted lines for clearness.

Figure 2 is a plan of the locking member.

Figures 3 and 4 are transverse sections of the bolt on the lineslill-lllt and FF7- FV of Figure 1.

Figure 5 is a view, similar to Figure l., of a modified form ot bolt.

Figure 6 is a plan of the locking member ot the modified form ot bolt.

Referring more particularly to the bolt of Figures l and 2 of the drawinthe numeral 2 designates the shank oi the bolt, which is provided at oneend with an integral head 3. The shank 2 is also provided intermediateits ends with a series ot rectangular depressions 5 which are arrangeopposite each other in pairs, and each pair of the depressions 5 extendat right angles to the next adjacent pair. rlhe rectangular or squareddepressions 5 terminate at the top and bottom in squared shoulders 6adapted to form gu'ideways for the U-shaped locking member 7.

rIhe member 7 is tapered towardits open throat so as to provide what isin effect a {Ll-shaped wedge and is adapted to it around the shank 2with its legs 8 and 9 in the depressions of one of the pairs ofdepressions 5. rlihe large or head end of the member 7 is provided witha flange 10 to increase the head area.

ln Figures 5 and 6 I have shown a bolt for the same purpose and of thesame design as the bolt of Figures 1 and 2, except that the head memberis adjust-able and the locking member is slightly modified.

lin this construction the shank 2 is' provided with a series of screwthreads l1 adjacent one end and a nut 3a formin the adjustable head isscrewed on and a justable along the screw threaded portion of the shank2. The head end of the shank 2 in this construction is upset as at l2 toprevent the removal of the head member 3a.

The locking member for this type of bolt is designated by the numeral 7aand is slightly modified in that the taper of the leg portions 8a and9EL is slightly greater adjacent their free ends to form an enteringwedge portion ot slightly greater taper, and the head portion shown onthe member 7 is omitted.

lin operation, when 'it is desired to assemble or stitch fabricatedstructures together prior to rivetin the fitting-up bolts of thisapplication wil be inserted through the rivet holes, and the lockingmembers entered in the pair of depressions or slots 5 nearest the piece.The locking members are then driven home, thus locking the structuralmembers together. `When the rivetin operation is started the bolts willbe removed as the riveting progresses by simply driving back the lockingmembers with a hammer or other similar tool.

The bolt of Figures 5 and 6 is adapted to have its head 3 adjusted byhand, so as to bring the depressions 5 into a more ideal lookin positionrelative to the work than is ossibe when using a permanent head, as inigures l and 2.

'llhe bolts constructed in accordance with this invention entirelyreplace the bolts of ordinary construction now used in tting up orstitching together fabricated structures in the shops, and entirelyeliminate the necesmechanics in the art and, therefore, I do not wish tobe limited to the exact construction shown, but to dene my inventiononly by the following claims.

I claim-d 1. A fitting-up bolt comprising a shank portion and a headportion, in combination with a tapered U-shaped locking member, saidshank portion being provided with a plurality of pairs of flatteneddepressions along its side walls, the depressions of each pair beingopposite each other, and each pair of depressions extending at rightlangles to the next adjacent pair, and said locking member being adaptedto fit around said shank with its legs in each ofthe depressions of anypair, so as to bind the work tion adapted to be threaded along saidpor-- tion to provide an adjustable head, means for preventing theremoval of said head nut,

said shank portion being provided with a.

plurality of pairs of flattened depressions along its side walls, thedepressions of each pair of depressions being opposite each other, andeach pair of depressions extend-v ing at right angles to the nextadjacent pair, and said locking member being adapted to fit around saidshank with its legs in each of the depressions of any pair, so that whensaid member is driven home it will act as a wedge to draw and bind thework pieces in which the bolt is mounted together. In testimony whereofI have hereunto signed my name.

` ANDREW W. HOOD.

